60
TS4000H
The following table describes the Base Unit operating modes.
Mode
Description
Run
Normal mode of operation for the TS4000H BU, IM, and electrochemical
cell. The latter takes readings and outputs them to the IM. The BU then
polls the IM every ten seconds.
Warn Level
IM reports toxic gas reading exceeding Warning level.
Alarm Level
IM reports toxic reading exceeding Alarm level.
Apply Gas
When the Calibration or Gas Check Modes has been invoked, the apply
gas bit informs the user when to apply gas to the TS4000H.
Remove Gas
This bit informs the user to remove the gas after the TS4000H has finished
Calibration or Gas Check.
Gas Being
Read
This bit informs the user that the gas is being read in either Calibration or
Gas Check Mode.
Initial
This informs the user that the TS4000H is in Start-up Mode.
Calibrate
Writing a one (1) to this bit informs the IM to zero and then calibrate the
sensor. The no gas, apply gas, and remove gas informs the user when to
apply or remove gas.
Gas Check
This mode will place the TS4000H in Gas Check Mode. The user applies
gas and the sensor current is disabled.
Ok Error
Cautionary errors (such as low line) that do not force the TS4000H to go
offline but indicate an unsafe operating situation.
Bad Error
Major errors that prohibit the TS4000H from operating in a safe manner
and result in the unit going offline. The TS4000H will not inform the user of
any gas being present.
Sensor Life
Reset
This bit informs the user that the Remaining Sensor Life Reset command
has been given by the BU and acknowledged by the IM.
Base Setup
This bit informs the user that a magnet is accessing the setup “
SE
” menu
option on the BU.
Table 26: Mode Descriptions
5.9.3 Status / Error (0x0002)
A Read command returns the bit map for any Error that is presently occurring, with duration of
at least ten seconds. The duration requirement screens out transient and intermittent errors.
The following table shows the errors that are represented by each bit in the register.
Table 27: Base Unit Status Error Bitmap
Bit
4
3
2
1
Error
F3:
Base Unit
Rom Error
F2:
Calibrate
Timeout
F1:
No Sensor
Plugged
F0:
IM Offline
Error
Hex
Value
0x0008 0x0004 0x0002 0x0001
Dec
Value
8 4 2 1
Bit
8
7
6
5
Error
F7:
Base Unit
EEPROM Error
F6:
Voltage Low
F5:
Sensor Failure
F4:
Sensor Rate
of Change Error
Hex
Value
0x0080 0x0040 0x0020 0x0010
