Maintenance mode – RKI Instruments GD-K77D User Manual
Page 28

23 • Operation
Model GD-K77D
Operator’s Manual
4-20mA Output
The following graph illustrates the relationship between the 4-20mA output and the gas
concentration.
Figure 10: 4-20 mA output vs. Gas Concentration
Maintenance Mode
There are two maintenance modes for the Model GD-K77D: Maintenance Mode 1 and
Maintenance Mode 2. Under Maintenance Mode 1, you can perform a zero adjustment
and confirm the alarm points. Under Maintenance Mode 2, you can confirm bias voltage
(optional), perform a zero adjustment, perform a span adjustment, and determine a
sensor’s start-up time. See “Calibration” under “Maintenance” for more information about
using Maintenance Mode 2.
To activate Maintenance Mode, remove the Model GD-K77D’s cover, then press and hold
the Mode switch for three (3) seconds.
0
External output
Gas
Concentration
22mA
20mA
Maintenance mode
6% of full scale
zero suppression
2.5 mA
4 mA
Full
Scale
Measuring mode
- Eagle Series (89 pages)
- Eagle Series (66 pages)
- 01 Series Manual (33 pages)
- 01 Series Quik Start (2 pages)
- OX-94 (13 pages)
- FP-3 (16 pages)
- GasWatch 1 (18 pages)
- GasWatch 2 Manual (37 pages)
- GasWatch 2 Quik Start (2 pages)
- GP-01 (34 pages)
- GP-01 with self resetting alarms (33 pages)
- GP-204 (7 pages)
- NP-204 (13 pages)
- RI-215A (24 pages)
- SC-01 (45 pages)
- SC-01 (68 pages)
- Data Cal 2000 (88 pages)
- EAGLE 2 Manual (309 pages)
- Eagle 2 Quik Start (2 pages)
- GX-94 (3 pages)
- GX-94 (52 pages)
- SDM-E2 (89 pages)
- SDM-E2 (224 pages)
- Eagle 1 Manual (89 pages)
- Eagle 1 Quik Start (2 pages)
- Inert Gas Testing Eagle with Two Pumps (66 pages)
- Gas Tracer (234 pages)
- Gas Tracer 10,000 ppm (120 pages)
- GX-2001 Manual (45 pages)
- GX-2001 Quik Start (2 pages)
- GX-2001 Canadian Version (43 pages)
- GX-2003 Manual (94 pages)
- GX-2003 Quik Start (2 pages)
- GX-2009 Manual (73 pages)
- GX-2009 Quik Start (2 pages)
- GX-2009 Supplement (2 pages)
- GX-2012 Manual (185 pages)
- GX-82 (22 pages)
- GX-82A (43 pages)
- GX-86 (22 pages)
- GX-86A (39 pages)
- GX-8000(PT0-098) (52 pages)
- GX-8000(H4-0050) (23 pages)
- RX-516 (36 pages)
- GX-2009 (2 pages)