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| Operating Instructions |
SMT500 Leak Detector
SP01501467 | REV A | 4.2021
Bosch Automotive Service Solutions Inc
Reference Guide
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1. Compound pressure gauge
• Indicates amount of pressure or vacuum
• Allows for decay/leak down test to confirm
repair is 100% complete
2. Flow meter
• Measures leak size as small as 0.010-in.
3. Flow control knob
• Open flow control valve to allow vapor/
pressure into the system
• Close flow control valve to lock out system
for pressure decay testing
4. Reset button
• Used for service functions only
5. Air-only test button
• Begins 5-minute air-only cycle to test
without vapor
• Blue light indicates onboard
microcompressor is generating air-only
6. Vapor test button
• Begins 5-minute vapor cycle
• Red light indicates vapor cycle
• Push again to stop testing
7. Power indicator light
• Green light indicates adequate power
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8. Fluid fill port
• Turn counter clockwise to remove
dipstick
9. External gas input
• 1/4-in. NPT threaded port
• Connects external compressed gas
(inert gases such as nitrogen or CO2)
10. Battery power cables
• Connects to 12-Volt DC b) and
chassis ground(-)
11. Vapor output hose
