Dwyer instruments, inc – Dwyer DPMX User Manual

Page 2

OPERATION
FUNCTION
The Series DPMX panel meter can be used with voltage or current signal
inputs. It is important that the signal wires be connected to the proper
terminals as labeled in Figure 2. Along with wiring to the proper
terminals, the proper input should be selected using the function
selection switch shown in Figure 3. For current inputs, the function
switch should be set to LPI. For adjustable voltage inputs, the function
switch should be set to VPI. For fixed voltage inputs, the function switch
should be set to DCV.

Figure 3

ZERO SUPPRESSION FOR CURRENT INPUT
The Series DPMX can be used with either 0 to 20 mA or 4 to 20 mA
current inputs. In order to maximize the rangeability of the meter, the LPI
offset jumper should be set to “+” for 4 to 20 mA signal inputs or to “-” for
0 to 20 mA inputs.
See Figure 4.

Figure 4

SELECTING DECIMAL POINT POSITION
Four decimal point positions are available on the digital panel meter,
DP1-OFF. Move the switch to the corresponding decimal point location.
See Figure 5.

Figure 5

SELECTING VOLTAGE INPUT RANGE
Three input positions are available for either VPI or DCV (see Figure 3
above). Move the switch to desired input range (see Figure 7).

Figure 7

DWYER INSTRUMENTS, INC.

Phone: 219/879-8000

www.dwyer-inst.com

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.

Fax: 219/872-9057

e-mail: [email protected]

Printed in U.S.A. 5/14

FR# R2-443568-00 Rev. 3

SPAN & ZERO ADJUSTMENT
The unit is equipped with a span adjustment for DCV inputs, and both
span and zero adjustments for LPI and VPI inputs. To use either
function, a flathead screwdriver is required to set the appropriate values.
First, choose the span and/or zero adjustment that corresponds with the
input that is being supplied. For example, if a VPI inputs is being
supplied to the meter, you will need to adjust the VPI span. Next, apply
the lowest input into the meter and adjust the zero position for the
required reading. After adjusting the zero position, apply the highest
input into the meter and adjust the span position for the meter. Recheck
the zero input and readjust as needed. See Figure 6.

Figure 6

MAINTENANCE
Upon final installation of the Series DPMX LED Digital Panel Meter, no
routine maintenance is required. A periodic check of the system
calibration is recommended. The Series DPMX is not field serviceable
and should be returned if repair is needed (field repair should not be
attempted and may void warranty). Be sure to include a brief description
of the problem plus any relevant application notes. Contact customer
service to receive a return goods authorization number before shipping.

LPI

VPI

DCV

FUNCTION

DP1

DP2

DP3

OFF

DECIMAL

CAUTION! Do not mount the panel meter outdoors or in damp
environments, or other extreme environments. It is not a sealed unit.

200 mV

10V

200 mV

20V

VPI

RANGES

DCV