YSI 556 MPS - Manual (Page 16)

Probe Module Section 3
YSI 556 MPS YSI Incorporated Page 10
2.4.2 Inserting 4 C Batteries
Figure 2.1 Inserting C Cells
CAUTION: Install batteries properly to avoid damage to the
instrument.
1. Loosen the four screws in the battery lid on the back of the
instrument using any screwdriver.
2. Remove the battery lid.
3. Insert four C batteries between the clips following the polarity
(+ and -) labels on the bottom of the battery compartment.
4. Check gasket for proper placement on the battery lid.
5. Replace the battery lid and tighten the 4 screws securely and
evenly.
NOTE: Do not over-tighten the screws.