15 Manual Updated May 19, 2020
Additional Specifications
Ingress Protection: IP57
Weight (without batteries): 4 lbs. 2.9 oz (1.90 kg)
Batteries: 4 x AA
Maximum Working Temperature (temperature of the water being measured): 140°F (60°C)
Maximum Working Pressure (inlet pressure into the backflow prevention assembly being tested): 175 psi
(1206 kPa)
Normal Operating Temperature: 64.4°F to 82.4°F (18°C to 28°C)
Accuracy: Provided the MK5 has been calibrated within the past 12 months and has version 12 of firmware
or later installed:
Range [PSID]
Accuracy (@70°F) [PSID]
0 to 15
±0.1
15 to 100
± 1% of reading
100 to 150
± 5% of reading
150 to 175
±10% of reading
Note for USC FCCCHR Manual 10 Approval, a minimum of ±0.2 PSID accuracy must be verified through
testing throughout the maximum range of working temperatures and pressures. The Mako has passed
this testing at the USC FCCCHR lab.
Storage Temperature: -4°F to 140°F (20°C to 60°C) 0 to 80% RH with battery removed from meter (batteries
tend to degrade from temperature and humidity changes and when outside normal operating
environments)
Auto-power off (when not disabled): 30 minutes
Response time: 1 second for the main display and 1/30 second for the rate of change graph.
