ENMET TARGET - Manual (Page 12)

TARGET Series ENMET Corporation
9
3.5.5 Internal Sampling Pump
If the TARGET instrument has the optional internal sampling pump installed, the Pop-Up menu provides the ability to
turn the pump on and off.
C AUTION : Some gases require that the pump be on for proper detection and calibration.
See Section 8.0, Tables 3 and 4.
To turn the pump on or off:
Press and hold the Menu buttons to enter the Pop-Up menu.
Press the MENU button five times to move the asterisk to the Pump position.
Press the SELECT button once to choose this screen.
Press the SELECT button to turn the pump on
Press the MENU button to turn the pump off.
SELECT
Example: Display, Internal Pump Status
If the pump is off, the bottom line of the display says “Set Pump ON”.
If the pump is on, the bottom line of the display says “Set Pump Off”.
N OTE : The Pump feature is only displayed in the Pop-Up menu if the instrument is supplied with the optional internal
sampling pump.
Attach the sampling shield supplied with the instrument, to the bottom of the instrument in the same manner as the
calibration shield, see Figure 8. The calibration shield has a orange label. The sampling shield has an yellow label.
Attach the supplied 20 foot sampling hose or the optional 2 foot sampling wand to the hydrophobic filter on the back
of the shield.
Sensor response time, if the tubing is 20 feet long, allow at least 10 seconds for the test sample to make it through the
tubing. The sensor response time is typically 30 – 60 seconds to achieve 90% of the final reading, depending on the
specific sensor and the gas being detected. Therefore, the total 'system' response time for an instrument using the
internal sampling pump and 20 feet of hose is approximately 40-70 seconds to achieve 90% of the final reading.
N OTE : The sampling shield and sampling hose or wand must be firmly and correctly attached to the TARGET
instrument for proper remote sampling operation.
The instrument monitors the sample pump operation and provides an audible alarm and visual indication on the status
line of the display, in the event of a low flow condition.
N OTE : The sampling shield and sampling hose or wand must be removed from the TARGET instrument for diffusion
operation.
For instruments with internal sampling pumps, a calibration procedure is required whenever a pump is replaced or
when calibration is performed on the instrument sensors.
It is also recommended to perform pump calibration if any abnormal pump operation is observed. Pump calibration is
performed in the Advanced Maintenance Menu. See section 6.4.8 for pump calibration instructions.
POP-UP MENU
Auto-Zero Comb disp
Cal Stat
Location
* Set Pump ON
SAMPLING PUMP
SELECT=ON
MENU=OFF
Current state: OFF