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Transmitter Battery Change
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Changing Lithium Battery on RF500 Series Transmitters
Battery Reordering
RF512, RF513,
RF515 & RF516 transmitters are fitted as standard with a high power 3.6V
Primary lithium-thionyl chloride C-size cell. Manufacturers part number Saft
LSH14 LIGHT or Saft LS26500. The Saft LS26500 battery can only be used in transmitters
manufactured after April-2009. The date-of-manufacture is encoded in the serial
number. The serial number has the format MMYYxxxx where MM represents the 2-digit
month and YY represents the 2-digit year in which the transmitter was manufactured.
Comark recommend that only the Saft LSH14 LIGHT be used in powered transmitters.
The Saft LS26500 battery can suffer from short lifetime when installed in powered
transmitters.
Only use Saft LSH14 LIGHT or Saft LS26500 as replacements.
Use Comark part number: ‘RFBATT’ to order a replacement battery.
RF542
transmitters use a 3.6V AA lithium thionyl chloride battery; this can be replaced
by any brand of 3.6V AA lithium battery.
Battery Change Procedure
The transmitter latches any low battery condition and must be powered off fully
for it to clear. Waiting for the display to go blank ensures that the low battery
status is cleared.
1. Disconnect all plugs from the transmitter and remove it from its mounting
bracket by sliding it upwards.
2. Using a Philips No 0 or flat-blade screwdriver
undo the two retaining screws and remove the battery cover.
3. Remove the
exhausted battery and wait a few seconds for the display to blank.
4. Replace
with a fresh one ensuring the polarity is correct and taking care to snap the
new battery in cleanly without making and breaking the contacts repeatedly.
5. Replace the battery cover and do up the two screws taking care not to overtighten
them.
6. Observe any local restrictions on disposal of the used cell.
Check for Transmitter Errors
The removal of the battery will cause the internal clock on the transmitter
to reset and so generate a Code-100 condition. This will be cleared automatically
by the Gateway, see “Transmitter Fault Codes” {Page 56} for details. Verify
that the transmitter display shows either “No Code”, “No Fault” or “Code-100”
only. Should a “Code-400” or “Code-500” occur after battery change on a previously
working transmitter try removing and reinserting the battery, taking care to
snap the new battery in cleanly without making and breaking the contacts repeatedly.
Gateway Indication of Low Battery
Once a transmitter shows “low battery” the radio is disabled, monitoring and
data logging however will continue until the battery becomes completely exhausted.
If a transmitter is left in a state of low battery for a long period, there
may be many logged records awaiting transmission to the Gateway. On changing
the battery the transmitter logs a “battery good” record but due to Automatic
Data Retrieval (ADR) {see below} this record is only transmitted to the Gateway
after any previously logged temperature records have been transmitted. Therefore
it may take several hours before the “battery good” record is received by the
Gateway which in turn clears the indication of Low Battery for the transmitter.
Automatic Data Retrieval (ADR)
The fact that transmissions between transmitters and the RF500 Gateway are acknowledged
ensures that the transmitters know exactly which data records have been successfully
transferred to the Gateway and those which must be re-transmitted. Therefore
if the Gateway is temporarily unable to receive or transmit messages for whatever
reason, data will not be lost during this period. When the Gateway is again
able to receive and transmit properly the transmitters will re-transmit those
records which were unable to be transmitted during the period of outage. This
re-transmission of data happens automatically without user intervention and
results in seamless graphical and tabular data with no gaps.
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