GD-70D
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<Calibration History/Alarm Trend History/Event History
Functions>
The detector and the sensor unit have their own history functions. To use these functions, contact RKI.
<Sensor Unit Automatic Recognition Function>
The detector can automatically recognize when a new sensor has been installed. If a replacement sensor
of the same type is installed, the detector will display a “C-01 CHG UNIT” message. If a different type
sensor is installed, the detector will display a “C-02 CHG SPEC” message.
C-01
CHG UNIT
MAINTENANCE
Unit Replacement
Displayed when a unit with the same specification (principle, type, range, and so
on) is attached (e.g. in a regular replacement).
1. Press the MODE key to confirm the new sensor unit and start the monitor.
The following is displayed alternately if the unit that you installed has the same
or earlier date of manufacture than the one that has been replaced.
"CHG UNIT" <=> "USED SEN"
*** Check for correct installation if this message is displayed because an old
sensor might have been installed by mistake.
↓
C-02
CHG SPEC
MAINTENANCE
Specification Change
Displayed when a unit with a different specification (principle, type, range, and
so on) from the previous one is attached.
1. Press the MODE key to confirm the new specification and start the monitor.
If you did not install a sensor unit with a different specification, this message
might mean there is an installation error. Check the sensor installation.
CAUTION
If you get a “C-02” message and confirm the specification change by pressing the MODE key, the
specification of the gas detector head is changed. The following parameters are changed to their standard
settings. If you want to use nonstandard settings, set them in Maintenance Mode.
•
Alarm setpoints (ALM P)
•
Alarm delay time setting (ALM DLY)
•
Suppression value (SUPPRESS)
•
Alarm type (ALM TYP) ...... The OSU specification includes "L-LL", "L-H", and "H-HH".
<Standard Setting Values by Principle>
ESU
SSU
NCU
SGU
OSU
(0-25 vol%)
OSU
(0 - 5 vol%)
OSU
(0 - 50 vol%)
Alarm delay
2-
second
2-second
2-second
2-
second
2-
second
2-
second
2-
second
Suppression
value
6%FS
2 ppm
(TEOS)
6%FS
(0-100%LEL)
10%FS
0.5 vol%
(AIR supp)
0 vol%
0 vol%
Alarm type
H-HH
H-HH
H-HH
H-HH
L-LL
H-HH
H-HH
IRU
(0-
500ppm)
SHU
(0-
2000ppm)
Alarm delay
2-
second
2-second
Suppression
value
30 ppm
200 ppm
Alarm type
H-HH
H-HH
