Bullard T4 User Manual

Page 2

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within the “crosshairs” shown in the middle of the screen. The accuracy of the

indicators is dependent on numerous factors including the distance from the

object being viewed and its emissivity, which is the object’s ability to radiate

heat. Units are calibrated with a preset emissivity corresponding with normal

construction materials. Objects with emissivities that vary greatly from this,

such as metals and shiny objects, will reduce the accuracy of the temperature

indication. Additionally, temperature measurement accuracy decreases as the

distance from the object in the “crosshairs” increases.

NOTE

The RHI provides a quick reference to compare objects of similar

emissivities to serve as a guide to pinpoint intense heat sources. Due

to the inherent issues with accuracy, use this feature with caution and

verify indicated heat levels through traditional means whenever possible.

Super Red Hot Feature

The T4MAX features Super Red Hot high heat colorization. With the Super

Red Hot feature, heat levels are identified by various color hues. Starting at

250°C, heated objects are tinted yellow and gradually transition to orange

and then solid red as heat levels rise. The Super Red Hot feature identifies

specific heat layers alerting firefighters to areas of intense heat. This feature

provides an enhanced visual awareness of the hottest objects in a scene.

Electronic Thermal Throttle

The T4MAX incorporates a highly useful and unique feature, the Electronic

Thermal Throttle. The Thermal Throttle is ideal for pinpointing hot

spots during overhaul, searching for overheated electrical equipment,

or clarifying objects in ambient temperature situations. To activate the

Thermal Throttle option, locate the two black buttons on the top of the

T4MAX (Figure 1). Press the down button (the button closer to the front

of the imager) to activate the Thermal Throttle. The Electronic Thermal

Throttle will automatically sense the hottest area in the scene and color

it blue. Continuing to press the down button (or holding it down) will

further engage the Thermal Throttle and will color more of the scene blue,

eventually coloring even the coolest objects blue.

NOTE

As the throttle engages more of the scene, the blue will become

lighter in hue to help differentiate objects in the scene.

As you cycle through the scene, you’ll see the symbol “TT” and a

corresponding number in the bottom left corner of the display. The “TT”

indicates “Thermal Throttle” mode. The number (0-100) is a point of

reference to indicate the level of Thermal Throttle engagement; by itself it

has no specific meaning. To lessen the amount of blue in the scene, press (or

hold) the up button. Alternatively, pressing both buttons simultaneously for

one second will deactivate the Thermal Throttle.

NOTE

The T4MAX Thermal Imager takes approximately eight seconds to

calibrate from initial startup. During this short startup period, the

Electronic Thermal Throttle or Digital Zoom will not engage.

Digital Zoom Feature

The T4MAX enables magnification of

far away scenes at both 2x and 4x

zoom. With one simple push of the

black “z” button, located next to the

power button under the LCD display,

the 2x zoom is enabled (Figure 2). A

second push of the button activates

the 4x zoom. A third push of the

button disables the zoom function.

The Digital Zoom feature also works

seamlessly with Electronic Thermal

Throttle and Super Red Hot.

Using the Battery Charger

The battery should be charged in the battery

charger using either the AC or DC adapter

provided (Figure 3). To charge a battery,

insert it into the charger so that the metal

contacts on the battery are aligned with the

metal contacts in the charger. A red light will

illuminate on the charger to indicate that the

battery is charging. When the light on the

charger turns to green, the battery is fully

charged. You may leave the battery in the

charger indefinitely as the battery will not

overcharge and the charger will initiate a

trickle charge to maintain the battery’s charge. For maximum battery life and

performance, you should remove the battery from the charger and discharge

it completely on a monthly basis.

NOTE

If you do not see the red LED illuminate when you place a battery into

the charger, the battery is not charging.

Loading/Unloading the Battery

Loading and unloading the battery on

the Bullard T4MAX is straightforward

(Figure 4). To install a battery, slide the

battery into the groove on the bottom of

the unit and ensure that the battery is

properly seated. To remove a battery,

depress both battery locking buttons

simultaneously and slide the battery out

of the unit. Since it can only be loaded

one way, the battery is easily replaced

in the dark. Additionally, as with all

batteries, your Bullard rechargeable

battery will experience a slow drain of its charge during storage. The amount

of drain varies widely based on storage conditions. For best performance,

charge each of your batteries every two weeks.

�

WARNING

DO NOT ALLOW THE METAL CONTACTS ON THE LABEL SIDE OF THE

BATTERY TO COME IN CONTACT WITH A CONDUCTIVE SURFACE, SUCH

AS A METAL TABLE OR ANOTHER BATTERY. THIS CAN COMPLETE THE

BATTERY CIRCUIT AND CAUSE THE BATTERY TO OVERHEAT OR MELT.

FAILURE TO OBSERVE THIS WARNING MAY RESULT IN PERMANENT

BATTERY DAMAGE, PROPERTY DAMAGE AND/OR SERIOUS INJURY.

NOTE

Fully charged NiMH batteries will provide a run time of more than

three hours. This run time will be less in extreme heat or extreme

cold conditions and/or if the transmitter is in use. To extend

the potential lifespan of your batteries, fully drain and recharge

each battery monthly. To help extend the life of the rechargeable

batteries and prevent unexpected instances of uncharged

batteries, develop a clear formalized plan for maintaining,

charging, and replacing your batteries.

Bullard provides an optional AA Alkaline battery case which can be used

as an alternative to the standard 10 V NiMH rechargeable batteries. The

AA alkaline battery case requires eight AA alkaline batteries. Once the

batteries are installed, the case loads into the unit in the same manner as

the standard NiMH battery. Due to the unique way that alkaline batteries

disperse power to the unit, the LED indicators will report battery levels that

are not necessarily indicative of the battery’s actual remaining charge. Fully

Figure 3

Figure 4

Battery Locking Buttons

Power Button

Zoom Button

Figure 2