Hach-Lange ORBISPHERE Model 51x User Manual - Manual (Page 103)

101
Services menu
13.1 Sensor diagnostics
Sensor diagnostics
Calibration timer The instrument can automatically remind the user when the next sensor
calibration is due.
•
Select measurement channel.
• Select enable and enter a delay in days.
• The display shows the current instrument date and time, next calibration
due date and time, and the remaining days.
The next calibration date is updated when the sensor is calibrated. The
event “Cal. required” is generated when the delay has elapsed.
Service timer The instrument can automatically remind the user when the next sensor
service is due.
•
Select enable and enter a delay in days. This should be validated by a
level 3 user.
The display shows the current instrument date and time, the next sensor
service due date and time, and the remaining days.
The next service date is updated when the button Service done is pressed
after a service. The event “Service required” is generated when the delay
has elapsed.
The sensor(s) attached to your instrument will require periodic servicing and
maintenance. For more information on this, please refer to the manual(s)
delivered with the sensor(s).
Null current
measurement (EC
sensor only) This is a diagnostic tool for Hach Lange technicians. This feature will allow
checking the ability of the EC measurement board to measure a null current.
This ability is very important to measure traces of gas.
•
Press Start to measure the sensor current generated.
•
The measurement board opens a contact in order to measure a null
current instead of the sensor current.
• The window displays the current measured, and information as to
whether the value is acceptable or not.
If the test fails please contact your Hach Lange representative.
Gas/Temperature (EC
sensor process) This feature allows you to check the ability of the EC measurement board to
measure a range of currents and temperatures. To use this feature an EC
sensor simulator (Part N° 32304) must be used in place of the sensor.
•
Select Temp or Gas and press Start
The software performs the check in several steps. It asks the user to select
different gas values and temperatures on the simulator. For each position, it
applies different anode voltages. For each position and voltage applied:
1.
it waits some time (typically 1 minute for a null current)
2. it displays if the values measured are acceptable (OK)
3. it displays the current and temperature measured
If the current or the temperature is not acceptable, a solution can be the
calibration of the "gas amplifier" or the "temperature amplifier". To do this,
please contact your Hach Lange representative.
Gas/Temperature (TC
sensor process) This feature allows you to check the ability of the TC measurement board to
measure a range of currents and temperatures. To use this feature a TC
sensor simulator (Part N° 29117) must be used in place of the sensor.
•
Depending on the operation(s) to be performed, select V2, V3, Temp or
Select All
and press Start
The software performs each check in several steps and asks the user to
select different values on the simulator. For each position, it applies different
anode voltages. For each position and voltage applied:
1.
it waits some time (typically 1 minute for a null current)
2. it displays if the values measured are acceptable (OK)
3. it displays the current and temperature values measured
If the current or the temperature is not acceptable, a solution may be the
calibration of the "gas amplifier" or the "temperature amplifier", in which
case please contact your Hach Lange representative.