SSM1 Measures • Pressure from 0~500 psia • Temperature from -40˚ ~ 400˚F Calculates • Superheat for low side • Subcool for high side (TVX) Systems Refrigerants: • R22 • R134a • R404a • R410a 1.800.547.5740 www.ueitest.
SSM1: Super Heat / Sub Cool Meter Thank you for purchasing the UEi SSM1 Superheat/Subcool Meter. Use the SSM1 to measure superheat and subcool by direct connections for temperature and pressure. The SSM1 is programmed with the most common four refrigerants, with data from the NIST-Pro refrigeration database for temperature-pressure values. Technical Note Superheat and subcool are the most effective measures to determine if a system is properly charged and operating within manufacture guidelines. 1.
What is Super Heat / Sub Cool? Refrigerant superheat refers to the rise in temperature of vapor after the refrigerant has completely changed from a liquid to a gas. The dew point (temperature at measured pressure where all of the liquid evaporates) is determined by properties of the refrigerant and measuring the pressure. When comparing this to the measured pipe temperature of the return line will determine superheat. The SSM1 will calculate this value directly and update in real time.
OPERATION 1. Press to power the meter on 2. Zero Pressure: While displaying pressure hold the “Pressure/TEMP” button for 3 seconds. 3. Press the “Pressure/TEMP” button to select the pressure or temperature mode. 4. Refrigerant Type: Press the “Refrig Type” button to scroll through the available refrigerant types (R22, R134a, R404A, R40A). 5. Press “ ” button to switch the backlight on or off. 6.
CONNECTIONS 1. Connect a standard refrigerant hose to the ¼” flare connector on top of the SSM1. (Fig.1) -OR- Connect the SSM1 in-line to a refrigerant source using the tee fitting (Fig.2) 2. Connect the included pipe clamp probe to the k-type input jack on top of the SSM1. (Fig. 1) Fig. 1 4. Fig.
Measuring superheat 1. Connect the pressure to the suction line service port 2. Attach the pipe clamp temperature probe to the suction line (must be at least 6” from the compressor) 1. 2. 5.
3. Press “Refrig Type” to select the proper refrigerant. The selected refrigerant type will show on the display.* * 4. Press “TEMP SH/SC” to select the desired parameter to view. 5. Add/ remove refrigerant by connecting the SSM1 in-line to a refrigerant source and monitor pressure while adding or removing refrigerant. NOTE: Refer to manufacturers specification and procedures when adding / removing refrigerant. 6.
Measuring SUBCOOL 1. Connect pressure to the liquid line service port 2. Attach the pipe clamp temperature probe on the condenser exit line 1. 2. 7.
3. Press “Refrig Type” to select the proper refrigerant. The selected refrigerant type will show on the display.* * 4. Press “TEMP SH/SC” to select the desired parameter to view. 5. Add/ remove refrigerant by connecting the SSM1 in-line to a refrigerant source and monitor pressure while adding or removing refrigerant. NOTE: Refer to manufacturers specification and procedures when adding / removing refrigerant. 8.
Temperature Calibration A process to set temperature calibration to an ice point is included to compensate for differences in temperature sensors, or to reset the unit to proper operation. Please follow these steps to perform a temperature set; 1. Connect temperature probe 2. Press “Pressure TEMP” to display probe temperature (verify that “TEMP” is shown on the LCD. 3. Place the temperature probe sensing area in a mixture of crushed ice and water. (Distilled water will provide the most accurate source) 4.
SPECIFICATIONS • • • • Operating Environment: 32~122°F Storage Environment: 0~140°F Over-range indication: OL Auto power off: After 30 minutes idle NOTE: Turn OFF when not in use to extend battery life. • Battery: Standard 9V battery, NEDA 1604, IEC6F22 Function 0~500 psia Resolution 0.1 psi (2kPa, 0.02 bars) -40~400°F 0.1° (-40~204°C) Accuracy ±0.5% FS + 1 digit ±1°F(-40~200°F) or ±0.5°C (-40~93°C) ±2°F (201~400°F) or ±1°C (94~204°C) 10.
Warranty The SSM1 is warranted to be free from defects in materials and workmanship for a period of three years from the date of purchase. If within the warranty period your instrument should become inoperative from such defects, the unit will be repaired or replaced at UEi’s option. This warranty covers normal use and does not cover damage which occurs in shipment or failure which results from alteration, tampering, accident, misuse, abuse, neglect or improper maintenance.
