7.1.4.1 Procedure for removing RH chip
1. Unscrew the protective cap (see
(p. 63)).
2. Hold the plastic sides of the RH chip and unplug it.
CAUTION:
To prevent scratching, avoid touching the silver chip, and handle the RH chip with care.
3. Rinse off the RH chip with distilled water or dispose of the old RH chip.
4. Hold the sides of the rinsed or new chip and plug it in.
5. Screw on the protective cap.
7.1.5 Data logger module
The data logger module contains a lithium battery that operates the clock and SRAM when the
module is not powered. The data logger does not draw power from the lithium battery while it is
powered by a 12 VDC supply. In an T107 stored at room temperature, the lithium battery should
last approximately 10 years (less at temperature extremes). Where the T107 is powered most or all
of the time, the lithium cell should last much longer.
While powered from an external source, the module measures the voltage of the lithium battery
daily. This voltage is displayed in the status table. A new battery will have approximately 3.6 volts.
The data logger Status Table has a “Lithium Battery” field. This field shows lithium battery
voltage.
Contact your local Toro distributor for replacing the battery when voltage is approximately 2.7 V.
If the lithium cell is removed or allowed to discharge below the safe level, the T107 will still
operate correctly while powered. Without the lithium battery, the clock will reset and data will be
lost when power is removed.
CAUTION:
Toro recommends factory replacement of the lithium battery. Misuse of the lithium battery in
the data logger or installing this lithium battery improperly can cause severe injury. It is a fire,
explosion, and severe burn hazard! Do not recharge, disassemble, heat above 100 °C (212 °F),
solder directly to the cell, incinerate, nor expose contents to water. Lithium batteries need to
be disposed of properly.
(p. 65) lists the specifications of the battery.
Section 7. Maintenance and troubleshooting
64
