Ashcroft GL42 - Low Differential Indicating Pressure Transmitter - Manual (Page 3)

i. Switch settings
ii. Functional description of display damping
The damping only refers to the display value of the LCD dis-
play and not the power output signal of the GL42 2-wire dif-
ferential pressure transmitter.
The display value is damped according to an e-function. The
set damping time corresponds to a change of the displayed
pressure value of 90% of the change of the input pressure.
The final display value is achieved after a four-fold damping
time.
b. Adjustment
To adjust the differential pressure transmitter, remove the lid
by unscrewing the four screws on the front of the device.
The zero-point and the range can be adjusted via the poten-
tiometer "ZERO" (zero-point) and "SPAN" (range). Ensure
correct alignment of the sensor in terms of the subsequent
installation to avoid position-dependent measuring deviations
when used later.
14. MAINTENANCE
The device does not require maintenance. In order to ensure
reliable operation and a long service life of the device we
recommend regular checking of the device as follows:
• Check the function in connection with system
components.
• Check the tightness of the pressure connection lines.
• Check the electrical connections.
The exact test cycles have to be adapted to the operating
and environmental conditions. The operating manuals of all
other devices are also to be observed if there is an interac-
tion of different device components.
15. TRANSPORT
The product must be protected against severe impacts.
Therefore transport is to be effected only in the packaging in-
tended for transport.
16. SERVICE
All defective or faulty devices are to be sent directly to Ash-
croft Inc. We would ask you to coordinate all device returns
with our inside sales department. Our inside sales depart-
ment will issue an RMA number and give instructions on how
to ship the return.
WARNING
Remaining medium in and on dismantled measuring instru-
ments may cause danger to persons, environment and equip-
ment. Take reasonable precautions! Clean the instru-ment
thoroughly if necessary.
To return the unit please choose the original packaging or a
packaging intended for transport.
17. DISPOSAL
Incorrect disposal can put the environment at risk.
Kindly help us protecting the environment and dispose of or
recycle the used products in accordance with the relevant
regulations.
18. DIMENSIONED DRAWINGS
(All units in mm unless otherwise specified.
44
33
22
11
Item Description
1 KL1 - PCB Terminal Block for power supply and signal output
2 S1 – DIP Switch for LCD Configuration
3 SPAN Adjustment Potentiometer
4 ZERO Adjustment Potentiometer
PRESSURE PORTS
(1/4 BARBED FITTING)
ELECTRICAL CONNECTION
(1/2 NPT FEMALE THREAD)
("CD" option shown)
1.05
3.51
2
.9
4
2.99
Ø 0.19
4 Places
1/8 NPT MALE
4
.8
9
2
.9
5
2.47
I&M011-10227 (GL42)_GL42 I&M 6/25/14 10:29 AM Page 3